Synthesis of anatase TiO(2) nanoshuttles by self-sacrificing of titanate nanowires.
Synthesis of anatase TiO(2) nanoshuttles by self-sacrificing of titanate nanowires.
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DOI：
10.1021/ic901235n
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发表时间：
2009-09
影响因子：
4.6
通讯作者：
Hongkang Wang;W. Shao;Feng Gu;Ling Zhang;Mengkai Lu;Chunzhong Li
中科院分区：
文献类型：
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作者：
Hongkang Wang;W. Shao;Feng Gu;Ling Zhang;Mengkai Lu;Chunzhong Li
以钛酸盐纳米线为前驱体，在碱性条件下采用水热法成功制备了锐钛矿型TiO（2）纳米梭。实验结果表明，在水热反应过程中，钛酸盐的结构发生了根本性的重排，从钛酸盐的线状结构转变为钛酸盐的梭状结构，这是一个基于溶解-重结晶的过程。钛酸盐纳米线的表面通过提供结构单元（例如，TiO（6）八面体）实现相变和溶解结构单元的沉积和重排的位置，而梭形形貌的形成归因于TiO（2）八面体稳定的（101）晶面使表面能最小化。结果表明，水热反应时间对产物的形貌和相变过程有一定的影响.拉曼和光致发光光谱证实了TiO（2）纳米梭的结晶性质。
Anatase TiO(2) nanoshuttles have been successfully prepared via a hydrothermal method under alkaline conditions by employing titanate nanowires as the self-sacrificing precursors. The experimental results showed that a radical structural rearrangement took place from titanate wires to anatase TiO(2) shuttles during the hydrothermal reaction on the basis of a dissolution-recrystallization process. The surface of titanate nanowires plays a key role in the transformation process by providing both the structural units (e.g., TiO(6) octahedra) to realize anatase transformation and locations for the deposition and rearrangement of the dissolved structural units, while the formation of shuttle morphology is attributed to the minimization of surface energy with thermodynamically stable (101) facets of anatase TiO(2). The shape and phase transformation process were foundto be dependent on the hydrothermal reaction time. Raman and photoluminescence spectra confirmed the crystalline nature of the TiO(2) nanoshuttles.